CheckFileType.com - Free Site to check a file type

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Determine a file type online quickly and free

Have you ever found a file on your computer without an extension or has an incorrect extension? This site helps you determine the true file type of any file based on the actual file, not the extension. Simply upload the file and we will test it and show you the results.

We do not require an e-mail or registration. The purpose of this site is to provide a quick tool to help you out and save time.

What is a file type?
Every file has a particular format. Files are either binary or ascii. Common ascii files would be simple text or more complicated formatted text such as PDF or XML. Common binary files are images (jpeg, gif, png) or compressed files. But the file formats can be layered, such as DOCX or PPTX. These are a collection of ascii XML files in a zip archive which makes it a binary file.

In some cases such as zip files this tool may search the contents of the archive to give you the file type of each file contained in the archive.

About your privacy
We store your file temporarily for processing, and then once it is completed we remove the file.


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  • FREE instant file type checking
  • No registration or e-mail required
  • We do not retain files